Speciation and environmental risk assessment of heavy metal in bio-oil from liquefaction/pyrolysis of sewage sludge

被引：111
|
作者：
Yuan, Xingzhong [1 ,2 ]
Leng, Lijian [1 ,2 ]
Huang, Huajun [3 ]
Chen, Xiaohong [4 ]
Wang, Hou [1 ,2 ]
Xiao, Zhihua [1 ,2 ]
Zhai, Yunbo [1 ,2 ]
Chen, Hongmei [1 ,2 ]
Zeng, Guangming [1 ,2 ]
机构：
[1] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China
[2] Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China
[3] Jiangxi Agr Univ, Sch Land Resources & Environm, Nanchang 330045, Peoples R China
[4] Cent South Univ, Sch Business, Changsha 410083, Hunan, Peoples R China
来源：
CHEMOSPHERE | 2015年 / 120卷
基金：
中国国家自然科学基金;
关键词：
Bio-oil; Heavy metal; Risk assessment; Pyrolysis; Liquefaction; QUANTITATIVE-EVALUATION; PYROLYSIS; EMISSIONS; DIESEL; POLLUTION; TOXICITY; TEMPERATURE; BIODIESEL; RESIDUES; BIOFUELS;
D O I：
10.1016/j.chemosphere.2014.10.010
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Liquefaction bio-oil (LBO) produced with ethanol (or acetone) as the solvent and pyrolysis bio-oil (PBO) produced at 550 degrees C (or 850 degrees C) from sewage sludge (SS) were produced, and were characterized and evaluated in terms of their heavy metal (HM) composition. The total concentration, speciation and leaching characteristic of HMs (Cu, Cr, Pb, Zn, Cd, and Ni) in both LBO and PBO were investigated. The total concentration and exchangeable fraction of Zn and Ni in bio-oils were at surprisingly high levels. Quantitative risk assessment of HM in bio-oils was performed by the method of risk assessment code (RAC), potential ecological risk index (PERI) and geo-accumulation index (GAL). Ni in bin-oil produced by pyrolysis at 850 degrees C (PBO850) and Zn in bio-oil by liquefaction at 360 degrees C with ethanol as solvent (LBO-360E) were evaluated to possess very high risk to the environment according to RAC. Additionally, Cd in PBO850 and LBO-360E were evaluated by PERI to have very high risk and high risk, respectively, while Cd in all bio-oils was assessed moderately contaminated according to GAI. (c) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：645 / 652
页数：8
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